import java.util.*;

/**
 * @author: liuchong
 * @create: 2023/2/27 16:53
 * @description:
 */
public class Test {
    public static void main(String[] args) {
        Set s = new HashSet();
        for (short i = 0; i < 100; i++) {
            s.add(i);
            s.remove((short)(i - 1));
        }
        System.out.println(s.size());
    }
}
